Q: Is 1,315,728 a Prime Number?
A: No, 1,315,728 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1315728 can be evenly divided by 1 2 3 4 6 8 9 12 16 18 24 36 48 72 144 9,137 18,274 27,411 36,548 54,822 73,096 82,233 109,644 146,192 164,466 219,288 328,932 438,576 657,864 and 1,315,728, with no remainder.
Since 1,315,728 cannot be divided by just 1 and 1,315,728, it is not a prime number.